Sync groups and feeds

Fervor/Fervor.swift

@@ -8,4 +8,4 @@
 import Foundation
 
 // todo: fervor: ids should be strings
-public typealias FervorID = Int
+public typealias FervorID = String

Fervor/FervorClient.swift

@@ -13,7 +13,11 @@ public class FervorClient {
     let session: URLSession
     public var accessToken: String?
     
-    private let decoder = JSONDecoder()
+    private let decoder: JSONDecoder = {
+        let d = JSONDecoder()
+        d.dateDecodingStrategy = .iso8601
+        return d
+    }()
     
     public init(instanceURL: URL, accessToken: String?, session: URLSession = .shared) {
         self.instanceURL = instanceURL
@@ -61,6 +65,16 @@ public class FervorClient {
         return try await performRequest(request)
     }
     
+    public func groups() async throws -> [Group] {
+        let request = URLRequest(url: buildURL(path: "/api/v1/groups"))
+        return try await performRequest(request)
+    }
+    
+    public func feeds() async throws -> [Feed] {
+        let request = URLRequest(url: buildURL(path: "/api/v1/feeds"))
+        return try await performRequest(request)
+    }
+    
     public struct Auth {
         public let accessToken: String
         public let refreshToken: String?

Reader.xcodeproj/project.pbxproj

@@ -15,6 +15,8 @@
 		D65B18BC27504FE7004A9448 /* Token.swift in Sources */ = {isa = PBXBuildFile; fileRef = D65B18BB27504FE7004A9448 /* Token.swift */; };
 		D65B18BE275051A1004A9448 /* LocalData.swift in Sources */ = {isa = PBXBuildFile; fileRef = D65B18BD275051A1004A9448 /* LocalData.swift */; };
 		D65B18C127505348004A9448 /* HomeViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D65B18C027505348004A9448 /* HomeViewController.swift */; };
+		D6A8A33427766C2800CCEC72 /* PersistentContainer.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6A8A33327766C2800CCEC72 /* PersistentContainer.swift */; };
+		D6A8A33727766EA100CCEC72 /* ManagedObjectExtensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6A8A33627766EA100CCEC72 /* ManagedObjectExtensions.swift */; };
 		D6C687EC272CD27600874C10 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6C687EB272CD27600874C10 /* AppDelegate.swift */; };
 		D6C687EE272CD27600874C10 /* SceneDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = D6C687ED272CD27600874C10 /* SceneDelegate.swift */; };
 		D6C687F6272CD27600874C10 /* Reader.xcdatamodeld in Sources */ = {isa = PBXBuildFile; fileRef = D6C687F4272CD27600874C10 /* Reader.xcdatamodeld */; };
@@ -80,6 +82,8 @@
 		D65B18BB27504FE7004A9448 /* Token.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Token.swift; sourceTree = "<group>"; };
 		D65B18BD275051A1004A9448 /* LocalData.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LocalData.swift; sourceTree = "<group>"; };
 		D65B18C027505348004A9448 /* HomeViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = HomeViewController.swift; sourceTree = "<group>"; };
+		D6A8A33327766C2800CCEC72 /* PersistentContainer.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PersistentContainer.swift; sourceTree = "<group>"; };
+		D6A8A33627766EA100CCEC72 /* ManagedObjectExtensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ManagedObjectExtensions.swift; sourceTree = "<group>"; };
 		D6C687E8272CD27600874C10 /* Reader.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Reader.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		D6C687EB272CD27600874C10 /* AppDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
 		D6C687ED272CD27600874C10 /* SceneDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SceneDelegate.swift; sourceTree = "<group>"; };
@@ -159,6 +163,15 @@
 			path = Home;
 			sourceTree = "<group>";
 		};
+		D6A8A33527766E9300CCEC72 /* CoreData */ = {
+			isa = PBXGroup;
+			children = (
+				D6A8A33327766C2800CCEC72 /* PersistentContainer.swift */,
+				D6A8A33627766EA100CCEC72 /* ManagedObjectExtensions.swift */,
+			);
+			path = CoreData;
+			sourceTree = "<group>";
+		};
 		D6C687DF272CD27600874C10 = {
 			isa = PBXGroup;
 			children = (
@@ -188,6 +201,7 @@
 				D6C687ED272CD27600874C10 /* SceneDelegate.swift */,
 				D65B18B527504920004A9448 /* FervorController.swift */,
 				D65B18BD275051A1004A9448 /* LocalData.swift */,
+				D6A8A33527766E9300CCEC72 /* CoreData */,
 				D65B18AF2750468B004A9448 /* Screens */,
 				D6C687F7272CD27700874C10 /* Assets.xcassets */,
 				D6C687F9272CD27700874C10 /* LaunchScreen.storyboard */,
@@ -404,9 +418,11 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				D6A8A33427766C2800CCEC72 /* PersistentContainer.swift in Sources */,
 				D65B18B627504920004A9448 /* FervorController.swift in Sources */,
 				D6C687EC272CD27600874C10 /* AppDelegate.swift in Sources */,
 				D6C687F6272CD27600874C10 /* Reader.xcdatamodeld in Sources */,
+				D6A8A33727766EA100CCEC72 /* ManagedObjectExtensions.swift in Sources */,
 				D65B18BE275051A1004A9448 /* LocalData.swift in Sources */,
 				D65B18B22750469D004A9448 /* LoginViewController.swift in Sources */,
 				D65B18C127505348004A9448 /* HomeViewController.swift in Sources */,

Reader/CoreData/ManagedObjectExtensions.swift

@@ -0,0 +1,38 @@
+//
+//  ManagedObjectExtensions.swift
+//  Reader
+//
+//  Created by Shadowfacts on 12/24/21.
+//
+
+import Foundation
+import Fervor
+
+extension Group {
+    
+    func updateFromServer(_ serverGroup: Fervor.Group) {
+        guard self.id == nil || self.id == serverGroup.id else { return }
+        self.id = serverGroup.id
+        self.title = serverGroup.title
+        // feeds relationships will be updated after feeds are created in PersistentContainer.sync
+    }
+    
+}
+
+extension Feed {
+    
+    func updateFromServer(_ serverFeed: Fervor.Feed) {
+        guard self.id == nil || self.id == serverFeed.id else { return }
+        self.id = serverFeed.id
+        self.title = serverFeed.title
+        self.url = serverFeed.url
+        self.lastUpdated = serverFeed.lastUpdated
+        // todo: check this
+        self.removeFromGroups(self.groups!.filtered(using: NSPredicate(format: "NOT id IN %@", serverFeed.groupIDs)) as NSSet)
+        let groupsToAddReq = Group.fetchRequest()
+        groupsToAddReq.predicate = NSPredicate(format: "id IN %@", serverFeed.groupIDs.filter { g in !self.groups!.contains { ($0 as! Group).id == g } })
+        let groupsToAdd = try! self.managedObjectContext!.fetch(groupsToAddReq)
+        self.addToGroups(NSSet(array: groupsToAdd))
+    }
+    
+}

Reader/CoreData/PersistentContainer.swift

@@ -0,0 +1,65 @@
+//
+//  PersistentContainer.swift
+//  Reader
+//
+//  Created by Shadowfacts on 12/24/21.
+//
+
+import CoreData
+import Fervor
+
+class PersistentContainer: NSPersistentContainer {
+    
+    private static let managedObjectModel: NSManagedObjectModel = {
+        let url = Bundle.main.url(forResource: "Reader", withExtension: "momd")!
+        return NSManagedObjectModel(contentsOf: url)!
+    }()
+    
+    private(set) lazy var backgroundContext: NSManagedObjectContext = {
+        let context = NSManagedObjectContext(concurrencyType: .privateQueueConcurrencyType)
+        context.parent = self.viewContext
+        return context
+    }()
+    
+    init(account: LocalData.Account) {
+        super.init(name: "\(account.id)", managedObjectModel: PersistentContainer.managedObjectModel)
+        
+        loadPersistentStores { description, error in
+            if let error = error {
+                fatalError("Unable to load persistent store: \(error)")
+            }
+        }
+    }
+    
+    func sync(serverGroups: [Fervor.Group], serverFeeds: [Fervor.Feed]) async throws {
+        try await backgroundContext.perform {
+            let existingGroups = try self.backgroundContext.fetch(Group.fetchRequest())
+            for group in serverGroups {
+                if let existing = existingGroups.first(where: { $0.id == group.id }) {
+                    existing.updateFromServer(group)
+                } else {
+                    let mo = Group(context: self.backgroundContext)
+                    mo.updateFromServer(group)
+                }
+            }
+            for removed in existingGroups where !serverGroups.contains(where: { $0.id == removed.id }) {
+                self.backgroundContext.delete(removed)
+            }
+            
+            let existingFeeds = try self.backgroundContext.fetch(Feed.fetchRequest())
+            for feed in serverFeeds {
+                if let existing = existingFeeds.first(where: { $0.id == feed.id }) {
+                    existing.updateFromServer(feed)
+                } else {
+                    let mo = Feed(context: self.backgroundContext)
+                    mo.updateFromServer(feed)
+                }
+            }
+            
+            if self.backgroundContext.hasChanges {
+                try self.backgroundContext.save()
+            }
+        }
+    }
+    
+}

Reader/FervorController.swift

@@ -19,6 +19,8 @@ class FervorController {
     private(set) var clientSecret: String?
     private(set) var accessToken: String?
     
+    private(set) var persistentContainer: PersistentContainer!
+    
     init(instanceURL: URL) {
         self.instanceURL = instanceURL
         self.client = FervorClient(instanceURL: instanceURL, accessToken: nil)
@@ -29,6 +31,10 @@ class FervorController {
         self.clientID = account.clientID
         self.clientSecret = account.clientSecret
         self.accessToken = account.accessToken
+        
+        self.client.accessToken = account.accessToken
+        
+        self.persistentContainer = PersistentContainer(account: account)
     }
     
     func register() async throws -> ClientRegistration {
@@ -44,4 +50,10 @@ class FervorController {
         accessToken = token.accessToken
     }
     
+    func syncGroupsAndFeeds() async {
+        async let groups = try! client.groups()
+        async let feeds = try! client.feeds()
+        try! await persistentContainer.sync(serverGroups: groups, serverFeeds: feeds)
+    }
+    
 }

Reader/LocalData.swift

@@ -28,11 +28,20 @@ struct LocalData {
     }
     
     struct Account: Codable {
+        let id: UUID
         let instanceURL: URL
         let clientID: String
         let clientSecret: String
         let accessToken: String
         // todo: refresh tokens
+        
+        init(instanceURL: URL, clientID: String, clientSecret: String, accessToken: String) {
+            self.id = UUID()
+            self.instanceURL = instanceURL
+            self.clientID = clientID
+            self.clientSecret = clientSecret
+            self.accessToken = accessToken
+        }
     }
     
 }

Reader/Reader.xcdatamodeld/Reader.xcdatamodel/contents

@@ -1,4 +1,31 @@
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-<model type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="1" systemVersion="11A491" minimumToolsVersion="Automatic" sourceLanguage="Swift" usedWithCloudKit="false" userDefinedModelVersionIdentifier="">
+<model type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="19574" systemVersion="21C52" minimumToolsVersion="Automatic" sourceLanguage="Swift" userDefinedModelVersionIdentifier="">
-    <elements/>
+    <entity name="Feed" representedClassName="Feed" syncable="YES" codeGenerationType="class">
+        <attribute name="id" attributeType="String"/>
+        <attribute name="lastUpdated" optional="YES" attributeType="Date" usesScalarValueType="NO"/>
+        <attribute name="title" attributeType="String"/>
+        <attribute name="url" attributeType="URI"/>
+        <relationship name="groups" toMany="YES" deletionRule="Nullify" destinationEntity="Group" inverseName="feeds" inverseEntity="Group"/>
+        <relationship name="items" toMany="YES" deletionRule="Nullify" destinationEntity="Item" inverseName="feed" inverseEntity="Item"/>
+    </entity>
+    <entity name="Group" representedClassName="Group" syncable="YES" codeGenerationType="class">
+        <attribute name="id" attributeType="String"/>
+        <attribute name="title" attributeType="String"/>
+        <relationship name="feeds" toMany="YES" deletionRule="Nullify" destinationEntity="Feed" inverseName="groups" inverseEntity="Feed"/>
+    </entity>
+    <entity name="Item" representedClassName="Item" syncable="YES" codeGenerationType="class">
+        <attribute name="author" optional="YES" attributeType="String"/>
+        <attribute name="content" optional="YES" attributeType="String"/>
+        <attribute name="id" optional="YES" attributeType="String"/>
+        <attribute name="published" optional="YES" attributeType="Date" usesScalarValueType="NO"/>
+        <attribute name="read" optional="YES" attributeType="Boolean" usesScalarValueType="YES"/>
+        <attribute name="title" optional="YES" attributeType="String"/>
+        <attribute name="url" optional="YES" attributeType="URI"/>
+        <relationship name="feed" maxCount="1" deletionRule="Nullify" destinationEntity="Feed" inverseName="items" inverseEntity="Feed"/>
+    </entity>
+    <elements>
+        <element name="Group" positionX="-63" positionY="-18" width="128" height="74"/>
+        <element name="Feed" positionX="-54" positionY="9" width="128" height="119"/>
+        <element name="Item" positionX="-45" positionY="63" width="128" height="149"/>
+    </elements>
 </model>

Reader/SceneDelegate.swift

@@ -44,6 +44,12 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
         // Called when the scene has moved from an inactive state to an active state.
         // Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
     }
+    
+    @MainActor
+    private func fetchFeeds() async {
+        let feeds = try! self.fervorController.persistentContainer.viewContext.fetch(Feed.fetchRequest())
+        print(feeds)
+    }
 
     func sceneWillResignActive(_ scene: UIScene) {
         // Called when the scene will move from an active state to an inactive state.
@@ -68,6 +74,11 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
         let home = HomeViewController(fervorController: fervorController)
         let nav = UINavigationController(rootViewController: home)
         window!.rootViewController = nav
+            
+        Task(priority: .userInitiated) {
+            await self.fervorController.syncGroupsAndFeeds()
+            await self.fetchFeeds()
+        }
     }
 
 }
@@ -75,7 +86,7 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
 extension SceneDelegate: LoginViewControllerDelegate {
     func didLogin(with controller: FervorController) {
         LocalData.account = .init(instanceURL: controller.instanceURL, clientID: controller.clientID!, clientSecret: controller.clientSecret!, accessToken: controller.accessToken!)
-        fervorController = controller
+        fervorController = FervorController(account: LocalData.account!)
         createAppUI()
     }
 }